A well penetrates an unconfined aquifer. The water level (i.e., head) in the well prior to pumping is $25$ $\mathrm{m}$. After a long period of pumping at a constant rate of $0.05 \mathrm{~m}^{3} / \mathrm{s}$, the drawdowns at distances of $50$ $\mathrm{m}$ and $150$ $\mathrm{m}$ from the well are observed to be $3$ $\mathrm{m}$ and $1.2$ $\mathrm{m}$, respectively.
The hydraulic conductivity of the unconfined aquifer is $\_\_\_\_$ $\times 10^{-4} \mathrm{~m} / \mathrm{s}$ (rounded off to two decimal places).
Consider $\pi=3.14$.
